Ads on Pandora

If any of you have been on Pandora recently you probably have noticed that Pandora now has 15 second commercials in between songs. I was not aware until the other day about this change and was pretty annoyed. Yes, it is free, and yes, they need to make money-but if it's commercials now, whats to stop it from having membership fees and essentially being the same thing as satellite radio. Another thing I was curious about is why they didn't send out an email letting it's users about the changes. It may have prevented some of the confusion when you heard talking coming from the computer when you thought you were playing music. Personally it scared the crap out of me when I heard a man's voice out of no where :) Oh well, I guess it's becoming more and more true that nothing in life is free... or advertisement free.